123742345 has 16 divisors (see below), whose sum is σ = 157703040. Its totient is φ = 92945664.

The previous prime is 123742331. The next prime is 123742349. The reversal of 123742345 is 543247321.

It is a happy number.

It is not a de Polignac number, because 123742345 - 2⁵ = 123742313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123742349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4972 + ... + 16498.

It is an arithmetic number, because the mean of its divisors is an integer number (9856440).

Almost surely, 2^123742345 is an apocalyptic number.

It is an amenable number.

123742345 is a deficient number, since it is larger than the sum of its proper divisors (33960695).

123742345 is a wasteful number, since it uses less digits than its factorization.

123742345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11664.

The product of its digits is 20160, while the sum is 31.

The square root of 123742345 is about 11123.9536586593. The cubic root of 123742345 is about 498.3174712112.

Adding to 123742345 its reverse (543247321), we get a palindrome (666989666).

The spelling of 123742345 in words is "one hundred twenty-three million, seven hundred forty-two thousand, three hundred forty-five".